imsm: PPL support

[thirdparty/mdadm.git] / md_p.h

diff --git a/md_p.h b/md_p.h
index 517b20411e29bc7c46229c1ea5e1e625d40a6174..358a28ce3fcff3be791712848c41402d835e79cd 100644 (file)
--- a/md_p.h
+++ b/md_p.h
@@ -78,11 +78,26 @@
 #define MD_DISK_ACTIVE         1 /* disk is running but may not be in sync */
 #define MD_DISK_SYNC           2 /* disk is in sync with the raid set */
 #define MD_DISK_REMOVED                3 /* disk is in sync with the raid set */
+#define MD_DISK_CLUSTER_ADD    4 /* Initiate a disk add across the cluster
+                                  * For clustered enviroments only.
+                                  */
+#define MD_DISK_CANDIDATE      5 /* disk is added as spare (local) until confirmed
+                                  * For clustered enviroments only.
+                                  */
 
 #define        MD_DISK_WRITEMOSTLY     9 /* disk is "write-mostly" is RAID1 config.
                                   * read requests will only be sent here in
                                   * dire need
                                   */
+#define        MD_DISK_FAILFAST        10 /* Fewer retries, more failures */
+
+#define MD_DISK_REPLACEMENT    17
+#define MD_DISK_JOURNAL                18 /* disk is used as the write journal in RAID-5/6 */
+
+#define MD_DISK_ROLE_SPARE     0xffff
+#define MD_DISK_ROLE_FAULTY    0xfffe
+#define MD_DISK_ROLE_JOURNAL   0xfffd
+#define MD_DISK_ROLE_MAX       0xff00 /* max value of regular disk role */
 
 typedef struct mdp_device_descriptor_s {
        __u32 number;           /* 0 Device number in the entire set          */
@@ -104,13 +119,14 @@ typedef struct mdp_device_descriptor_s {
 #define MD_SB_BLOCK_CONTAINER_RESHAPE 3 /* block container wide reshapes */
 #define MD_SB_BLOCK_VOLUME     4 /* block activation of array, other arrays
                                   * in container can be activated */
+#define MD_SB_CLUSTERED                5 /* MD is clustered  */
 #define        MD_SB_BITMAP_PRESENT    8 /* bitmap may be present nearby */
 
 typedef struct mdp_superblock_s {
        /*
         * Constant generic information
         */
-       __u32 md_magic;         /*  0 MD identifier                           */
+       __u32 md_magic;         /*  0 MD identifier                           */
        __u32 major_version;    /*  1 major version to which the set conforms */
        __u32 minor_version;    /*  2 minor version ...                       */
        __u32 patch_version;    /*  3 patchlevel version ...                  */
@@ -193,5 +209,87 @@ static inline __u64 md_event(mdp_super_t *sb) {
        return (ev<<32)| sb->events_lo;
 }
 
-#endif
+struct r5l_payload_header {
+       __u16 type;
+       __u16 flags;
+} __attribute__ ((__packed__));
+
+enum r5l_payload_type {
+       R5LOG_PAYLOAD_DATA = 0,
+       R5LOG_PAYLOAD_PARITY = 1,
+       R5LOG_PAYLOAD_FLUSH = 2,
+};
+
+struct r5l_payload_data_parity {
+       struct r5l_payload_header header;
+       __u32 size; /* sector. data/parity size. each 4k has a checksum */
+       __u64 location; /* sector. For data, it's raid sector. For
+                               parity, it's stripe sector */
+       __u32 checksum[];
+} __attribute__ ((__packed__));
+
+enum r5l_payload_data_parity_flag {
+       R5LOG_PAYLOAD_FLAG_DISCARD = 1, /* payload is discard */
+       /*
+        * RESHAPED/RESHAPING is only set when there is reshape activity. Note,
+        * both data/parity of a stripe should have the same flag set
+        *
+        * RESHAPED: reshape is running, and this stripe finished reshape
+        * RESHAPING: reshape is running, and this stripe isn't reshaped
+        * */
+       R5LOG_PAYLOAD_FLAG_RESHAPED = 2,
+       R5LOG_PAYLOAD_FLAG_RESHAPING = 3,
+};
 
+struct r5l_payload_flush {
+       struct r5l_payload_header header;
+       __u32 size; /* flush_stripes size, bytes */
+       __u64 flush_stripes[];
+} __attribute__ ((__packed__));
+
+enum r5l_payload_flush_flag {
+       R5LOG_PAYLOAD_FLAG_FLUSH_STRIPE = 1, /* data represents whole stripe */
+};
+
+struct r5l_meta_block {
+       __u32 magic;
+       __u32 checksum;
+       __u8 version;
+       __u8 __zero_pading_1;
+       __u16 __zero_pading_2;
+       __u32 meta_size; /* whole size of the block */
+
+       __u64 seq;
+       __u64 position; /* sector, start from rdev->data_offset, current position */
+       struct r5l_payload_header payloads[];
+} __attribute__ ((__packed__));
+
+#define R5LOG_VERSION 0x1
+#define R5LOG_MAGIC 0x6433c509
+
+struct ppl_header_entry {
+       __u64 data_sector;      /* raid sector of the new data */
+       __u32 pp_size;          /* length of partial parity */
+       __u32 data_size;        /* length of data */
+       __u32 parity_disk;      /* member disk containing parity */
+       __u32 checksum;         /* checksum of this entry's partial parity */
+} __attribute__ ((__packed__));
+
+#define PPL_HEADER_SIZE 4096
+#define PPL_HDR_RESERVED 512
+#define PPL_HDR_ENTRY_SPACE \
+       (PPL_HEADER_SIZE - PPL_HDR_RESERVED - 4 * sizeof(__u32) - sizeof(__u64))
+#define PPL_HDR_MAX_ENTRIES \
+       (PPL_HDR_ENTRY_SPACE / sizeof(struct ppl_header_entry))
+
+struct ppl_header {
+       __u8 reserved[PPL_HDR_RESERVED];/* reserved space, fill with 0xff */
+       __u32 signature;                /* signature (family number of volume) */
+       __u32 padding;                  /* zero pad */
+       __u64 generation;               /* generation number of the header */
+       __u32 entries_count;            /* number of entries in entry array */
+       __u32 checksum;                 /* checksum of the header */
+       struct ppl_header_entry entries[PPL_HDR_MAX_ENTRIES];
+} __attribute__ ((__packed__));
+
+#endif